Commit d66e9d50 authored Apr 08, 2022 by Peter Zijlstra

x86,objtool: Explicitly mark idtentry_body()s tail REACHABLE

Objtool can figure out that some \cfunc()s are noreturn and then
complains about certain instances having unreachable tails:

vmlinux.o: warning: objtool: asm_exc_xen_unknown_trap()+0x16: unreachable instruction

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220408094718.441854969@infradead.org

parent d4e5268a

arch/x86/entry/entry_64.S

+3 −0

Original line number	Diff line number	Diff line
		@@ -337,6 +337,9 @@ SYM_CODE_END(ret_from_fork)

		call \cfunc

		/* For some configurations \cfunc ends up being a noreturn. */
		REACHABLE

		jmp error_return
		.endm